The drop was also more pronounced for Americans between the ages of 18 and 64.

"From 1997 through 2013, the percentage of adults aged 18-64 who were uninsured at the time of interview generally increased," said the CDC report. "More recently, the percentage of uninsured adults aged 18–64 decreased, from 20.4% in 2013 to 12.4% in 2016."

Here's the full drop off for the top 17 cities in chart form.

In terms of income, the CDC reported there was "no significant change in the percentage uninsured" among low-income Americans between 2015 and 2016, but the most recent numbers confirmed the precipitous drop since 2010 for that group.

"A decrease was noted in the percentage of uninsured adults from 2010 through 2016 among all three poverty status groups," said the report. "However, the greatest decreases in the uninsured rate since 2013 were among adults who were poor or near poor."

The decline since 2010 corresponds with the passage of the Affordable Care Act, also known as Obamacare.